CVE-2021-23037

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-14 · updated 2026-06-17
Weakness: CWE-79

Description

On all versions of 16.1.x, 16.0.x, 15.1.x, 14.1.x, 13.1.x, 12.1.x, and 11.6.x, a reflected cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

F5 BIG-IP APM: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
BIG-IP: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Big-Ip Analytics: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Networks, Inc. BIG-IP (AAM): from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
BIG-IP ASM: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 BIG-IP DNS: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Big-Ip Fraud Protection Service: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Big-Ip Global Traffic Manager: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Big-Ip Link Controller: from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 BIG-IP (LTM): from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0
F5 Networks, Inc. BIG-IP (PEM): from 11.6.0 through 11.6.5; from 12.1.0 through 12.1.6; from 13.1.0 through 13.1.4; from 14.1.0 through 14.1.4; from 15.1.0 through 15.1.3; from 16.0.0 through 16.1.0

References

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